Minazuki Karen

Karen Minazuki (水無月 かれん, Minazuki Karen?) / Cure Aqua (キュアアクア, Kyua Akua?), Pretty Cure of Intelligence
Voiced by: Ai Maeda
Karen is Komachi's classmate and best friend, comes from an affluent family and is a member of the student council. Her parents are musicians and often go on tour. She misses them, but will not ask for them to come home for fear of disturbing their work, so despite wealth and popularity, she is often lonely.
Seen around school as cool and inspiring, most of the students look up to her. She, as Nozomi learns, is the most trustworthy Cure. In the beginning, she is reluctant to join the Cure team. In episode 6, as the girls are being manhandled, Karen stands up for her friends, vowing to protect them regardless of transformation. The butterfly that eluded her previously reappears and successfully lands on her wrist, enabling her to transform to Cure Aqua. For catching Pinkies, Coco gets a violin from her Pinky Catch. As Cure Aqua-counterpart of Cure Mint-she wears deep blue in her outfit, resembling Cure Mint's outfit.

She introduces herself as "The Blue Spring of Intelligence, Cure Aqua!" (知性の青き泉 キュアアクア!, Chisei no aoki izumi, Kyua Akua!?) Like Nozomi and Komachi with Coco and Nuts respectively, she has a special bond with Milk.

In the first movie, her counterpart is Dark Aqua, who is voiced by Reiko Kiuichi.